Logically, a color, green etc., is a 'simple' notion and cannot be explained terms of anything simpler. With color we have to revert to a different description, here wavelength. But wavelength is not human perception (and we can't explain such perception in simpler terms).
(Yes in New York and Indiana, no in Massachusetts, and the law is silent elsewhere. Personally I believe that because the torta exists, the burrito may have some characteristics of a sandwich but should be considered a wrap)